Motion-Picture Film (8-mm Type S) - 50-Ft Model 1 Sound Camera Cartridge - Aperture, Pressure Pad and Film Position
电影胶片(8-mm S型)-50英尺型号1声音照相机墨盒-光圈、压力垫和胶片位置
This standard specifies the dimensions and location of the cartridge aperture and pressure pad as well as the position of the film in the aperture of 8-mm type S 50-ft model I sound motion-picture film camera cartridges.